Locking mechanism



J. F. SCHAEFER.

LOCKING MECHANISM.

APPLICATION FILED NAILS-31.1919.

LQQQQgQ, Patented Feb. 14, 1922.

I tumbler iiti " of Fig. 8;

UNITED STATES PATENT GFICE. X

JOSEPH F. SCHAEFER, OF SHAKER HEIGHTS VILLAGE, OHIO, ASSIGNOB TO THE VAN0F CLEVELAND, OHIO, A CORPORATION OF OHIO.

BORN IRON WORKS,

LOCKING MECHANISM.

Specification of Letters l atent. Patented Feb, 14, 1922,

Application filed March 31, 1919. Serial No. 286,417.

T 0 all whom it may concern:

Be it known that I, J OSEPH F. SCHAE-FER, a citizen of the UnitedStates, residing at Shaker Heights Village, in the county of Cuyahogaand State of Ohio, have invented certain new and useful Improvements inLooking Mechanism, of which the following is a specification.

This invention relates to locks and par ticularly to those of the pintumbler type.

The pin tumbler construction is utilized very extensively in connectionwith locking mechanism but heretofore the pin tumbler barrel itself hasbeen utilized for throwing the locking mechanism by rotating it with akey. It is also customary to arrange the pin and plungers between thepin tumbler barrel and cylinder in a manner such that the key isnecessary in the operation of the pin tumbler barrel. The object of thepresent invention is to arrange the mechanism so that a key must be usedfor releasing the pin barrel when moved to unlocked position, afterwhich the key may be withdrawn and the pin tumbler barrel returned tolocked position without the use of the key.

Further details of the invention will more fully and at large appear inthe following description, drawings and claims.

Referring to the drawings, Fig. 1 is aview showing a type of lockingmechanism employing my improved pin tumbler control and applied to afiling cabinet, parts of the cabinet being broken away to clearlyillustrate the device; Fig. 2 is a front elevation of the front edge ofthe side wall of the cabinet showing the pin tumbler barrel and cylindermechanism applied thereto; 3 is a side elevation of the pin tumblerbarrel and cylinder mechanism with the former in locked position; Fig.4c is a similar view with the pin tumbler or barrel in unlockedposition; Fig. 5 is a section upon the line 5-5, of Fig. 2; Fig. 6 is asection upon the line 6-6, Fig. 7 is a detail view, partly in section.showing the locking lugs on the side of the drawer and the lockingtongue on the locking bar; and Fig. 8 is a top plan view showing in planand in dotted lines the arrangement of the two groups of plungers.

lin the drawings, 1 represents the side of a filing cabinet presenting anarrow flat front edge 2. Slidably mounted within the cabinet andsuitably supported against the side 1 is a vertically disposed bar 8having tending arm 10 having a flange tongues 4 extending from one sidethereof and out of the plane of the bar, one of said tongues being shownin Figs. 1 and 7. These tongues are adapted to engage behind drawer lugsor blocks 5 secured to the sides 6 of the drawers. The arrangement ofthe bar 3, tongues 4 and lugs 5 is such that when the bar is elevatedthe tongues 4 are in position such that they are in the path of the lugsor blocks 5 and prevent the movement of the drawers if closed and permitthe closing of a. drawer or drawers by the lugs or blocks 5 sliding pastthe tongues which yield outwardly for this purpose. The bar 3 isprovided with a pin 7 near its upper end engaging in an arm 8 of a bellcrank lever, which is pivoted to a pin 9 secured to the side of thecabinet. This lever is provided with a downwardly ex- 11 provided withan opening 12 for a purpose to be described. It will be is rocked inaclockwise direction the bar 3 will be elevated and the tongues 4 willbe in the path of the lugs or blocks 5. When the lever is rocked in acounter-clockwise direction the tongues 4 are out of the path of theseblocks or lugs so that the drawers may be opened freely.

The bell cranklever above described is operated and controlled by a pintumbler and cylinder structure and it consists of a cylinder 13 having aflat portion or pad 14 provided with suitable threaded openings 15 forreceiving screws 16 by which the cylinder is secured to the cabinet.This cylinder projects through a suitable opening in the front edge ofthe side wall, as shown in Fig. 2. The cylinder 13 is also provided withan eccentrically disposed opening 1'? adapted to receive the in tumblerbarrel as will appear. The cylinder is still further provided with agroup of openings 18 which are radial with respect to the opening 17'.These openings 18 receive springs 19 and plungers 20 of usualconstruction. The group of openings 18, and the plungers mountedtherein, are to the rear of the cylinder and toward the front thecylinder is provided with a similar .series of openings 21 receivingsprings 22 and plungers 23 larger in diameter than the plungers 20 for apurpose which will appear. The cylinder is still further provided with aportion 24 as shown in Figs. 3 and 4, which is concentric with theopening 17 and through this wall seen that when the lever there is aspiral slot for a purpose to be described.

Slidably and rotatably mounted in the opening 18 is a pin tumbler barrel26 having the usual key slot 27 therein opening out through the front.This pin tumbler barrel is further provided with a flange or bead 28seating in a suitable opening in the front face of the cylinder andlimiting the rearward movement of the pin tumbler barrel. The pintumbler barrel is provided at its inner end with an annular recess 26adapted to receive the arm 10 of the bell crank lever. and engage in theopening 12 thereof;

Extending radially into the pin tumbler barrel 26 and cutting the keyslot 27 are pins 29 of the usual construction and adapted to registerwith the opening 18 and the openings 21 when in certain positions. Thepin tumbler barrel is still further provided with a pin 30 secured inthe side thereof andengaging in the spiral slot 25 and the arrangementof this pin and slot is such that when the pin tumbler barrel is in itsextreme in. ward position, as shown in Fig. 3, the pin 30 is at theinner end of the slot 25 when the pins 29 will align with the openings18 and the plungers therein. When the pin tumbler barrel is movedoutwardly, however, by rotary longitudinal movement, the pin 30 is atthe outer end of the slot 25 and the pins register with the openings 21.When in this latter position the key may be withdrawn by reason of thefact that the pins 29 may move out freely against the plungers 23 butafter withdrawal of the key these same tary and sliding movement for thelocking i and unlocking operations, co-operating key actuated plungersand pins between the cylinder and barrel and means for moving said keybarrel outward beyond the cylinder when unlocked and for returning saidbarrel to locked position when pushed in;

2. The combination with a cabinet wall of a lock flush with the outerface of said wall, and comprising a cylinder, a key receiving barrelhaving a rotary and sliding movement for the locking and unlockingoperations, cooperating key actuated plungers and pins between thecylinder and barrel, means for releasing the key when the barrel is inunlocked position, means permitting the move ment of the barrel fromunlocked to locked position without the use of the key, and means formoving said key barrel outward beyond the cylinder when unlocked and forreturning said barrel to locked position when pushed in.

In testimony whereof I affix my signature.

JOSEPH F. SCHAEFER.

